After leaving the shaving cream out overnight, most of the liquid evaporates and wispy thin threads of solid soap remain. It’s not always so easy to say definitely that a substance is a solid, liquid, ...

Cut one or two bars of Ivory soap so that each group gets about 1/4 of a bar. Do a demonstration to introduce the concept of a precipitate – formation of a solid from the reaction of two liquids.

I also prefer a natural solid dish soap bar over liquid soap because it tends to be more eco-friendly and produces less waste ...

Lysol is the least expensive choice initially, though it uses disposable soap cartridges that can't be easily refilled with less expensive liquid soap. Our iTouchless device developed small rust ...